That wasn't me, and I said "in the usual sense" specifically because the context was Will's (unusual) definition.

I apologize for confusing you with him.

Personally I'd describe it as an effect caused by the presence of the gene, which genetic drift isn't.

Okay, well I would still guess that natural selection is going at a good clip these days. For example it seems pretty likely that the gene for twinning is spreading pretty fast.